Dhcp leasing problem

[Farbror Slöfus]

I have a problem with my internet,
i loose my connection for 31 seconds intevalls at random after some hours online,

but it seems like this only happends when i use the two P2P applications Winmx & DC++
(but Azureus and Emule remains unefected by interuptions) and its rare thath i see this interuptions when i just browse the webb
However! at the moment when the connection drops in file-sharing allso my browsing ability goes down during this seconds

I have saved the router event logs, and i know exactley what the problem is, watch this
http://img218.imageshack.us/img218/488/testpatrullenactivewindet3.th.jpg (http://img218.imageshack.us/my.php?image=testpatrullenactivewindet3.jpg)
I allso cauth this smooth criminal in Wireshark, looks like this, ICMP Protocol all of a sudden
http://img211.imageshack.us/img211/2517/1fullscreenun6.th.png (http://img211.imageshack.us/my.php?image=1fullscreenun6.png)
the problem is..that im not bright enough to understand how to use sniffer
softwares in deep and accually understand how to track after additional info

I have confronted my ISP about the overall problematic, thei say thath thei can't see any problems on their side, and when i think of the fact..thath with my old ISP the problem looked exactley the same as now, its therefore i think a to big coincedence thath this would be their fault, and i didnt even hade a router back then..just a standard modem
and my memory says me thath i didnt have this problem when i hade my old computer, unfortentley its dead now..so i cant go back and check

So i strongly believe it's my computer who is the problem here...thath for some unknown reason are forced to this "dhcp leasing"

Do you know any way it could be possible to take action against "dhcp leasing" before it occurs?

I have a speedtouch 780 WL router anyway, and i have created a "Static IP"

I have Windows XP SP2 (with thath connection limit optimizer patch installed allready)

[Sephiroth]

When you say you created a static ip, did you pay for a static IP from your ISP because if you dont actually have a static IP assigned to you from your ISP then that could cause some problems.

The Log you posted it says the destination host is unavailable, the problem is on your Local network because both the source and destination have 192.168.x.x ip addresses.

You should not be setting your PC to use a static IP on your local network because it is a completely different IP address than your internet IP address, You should let your PC and Router automatically obtain and assign a IP address because it is on a local network. If you really want a static IP then you have to configure that on your router and not your PC.

[Farbror Slöfus]

When you say you created a static ip, did you pay for a static IP from your ISP because if you dont actually have a static IP assigned to you from your ISP then that could cause some problems.

The Log you posted it says the destination host is unavailable, the problem is on your Local network because both the source and destination have 192.168.x.x ip addresses.

You should not be setting your PC to use a static IP on your local network because it is a completely different IP address than your internet IP address, You should let your PC and Router automatically obtain and assign a IP address because it is on a local network. If you really want a static IP then you have to configure that on your router and not your PC.


No i have not paid for it, i have created it with Windows, my ISP has given me a permanent IP..BUT its only for web browsing, if i not create a static IP myself..then it become inpossible to use P2P softwares..cause i cant portforward without a static IP..and i must portforward with the router for it to work

And allso i hade this same problem with my old ISP, and i hade a dynamic IP with them, so it cant be this "Static IP" who are causing this..im positive:icon_salu

but you comfirmed my suspioness that this is caused by my local network, and im glad to know thath now

can any networks sniffer be able track down this. im curious?

i wonder if it could be my motherboard/Chipset modell who accually causing this..some settings? i mean this started whit this computer..no problem with my old one

I have currentley

Motherboard - ASUS P5WD2-Premium (updated)

Intel Chipset 955x Express Chipset (updated to latest IU)
Memory controller:82955X

[Sephiroth]

If your network card is onboard then it could be your motherboard but try updating or reinstalling the network drivers. It could also be your network settings.

No network sniffers arent really going to tell you much of anything, the problem is that it cant get a IP address and the network sniffer that you posted says pretty much that. You can tell the same thing because in windows your PC will show up as not connected to the network.

[zaphodiv]

i know exactley what the problem is,
Jumping to conclusions is not a good way to solve problems.


it seems like this only happends when i use the two P2P applications Winmx & DC++
(but Azureus and Emule remains unefected by interuptions)

This strongly suggests the router has buggy firmware or not enough memory to handle all the connections you are putting through it. Emule makes lots of connections with default settings so I suspect buggy firmware.

Have you loaded the latest firmware?

Googling found this page
http://www.thomson-broadband.co.uk/codepages/content3.asp?c=7&ProductID=528


I allso [caught] this smooth criminal in Wireshark

It's just the router saying it can forward some packets to the next hop. You don't know
exactly why it can't send those packets out to the internet.


You should not be setting your PC to use a static IP on your local network because it is a completely different IP address than your internet IP address

A static internet ip address must be allowed by the ISP. A static LAN ip address behind a NAT connection sharing device is just a local setting. There is nothing wrong with giving a computer behind a NAT a static adress that is consistant with other LAN settings.


If your network card is onboard then it could be your motherboard but try updating or reinstalling the network drivers. It could also be your network settings.

The problem is related to the router. There is nothing to suggest that the network card is failing to send or receive packets, just the opposite, it gets ICMP message from the router so this advise is not helpfull.



No network sniffers arent really going to tell you much of anything, the problem is that it cant get a IP address
Wrong, a network sniffer can show if the problem is with the LAN or with the internet connection.


the problem is that it cant get a IP address

The router log suggests that the router is failing to renew it's internet ip allocated by the router. We can't tell is this a symptom of another problem such as the DSL line being down or a cause (buggy router or ISP end not allocating an IP).


and the network sniffer that you posted says pretty much that.

You are also jumping to conlusions. The sniffer log just shows reports of packets not
being delivered. It could be for other reasons such as the line dropping for other reasons such as an intermittent connection is a junction box somewhere or noise on the telephone line.


You can tell the same thing because in windows your PC will show up as not connected to the network.

Another invalid conculsion.
Firstly it sounds like he is using a static LAN ip so he won't get the "limited or no connectivity" message. Second a symptom or cause of the problem is the router not getting an ip from the ISP, not with the routers DHCP server feature allocating an ip to the PC.

[Farbror Slöfus]

If your network card is onboard then it could be your motherboard but try updating or reinstalling the network drivers. It could also be your network settings.

the modell of my network driver doesnt need any drivers, plug and play with win XP

http://www.sweex.com/producten.php?sectie=7&subsectie=7&item=65&artikel=715
i have followed the settings instructions..but offcorse there can still be wrong..one safe thing to do would be to reinstall windows again


Jumping to conclusions is not a good way to solve problems
my point whas..i know thoose lines represent this connection dropp for sure..but used bad words ;) :drunken_s


This strongly suggests the router has buggy firmware or not enough memory to handle all the connections you are putting through it. Emule makes lots of connections with default settings so I suspect buggy firmware.

Have you loaded the latest firmware?

Googling found this page
http://www.thomson-broadband.co.uk/codepages/content3.asp?c=7&ProductID=528
No i have not updated, but i found thath page to, but there isnt any install instructions what i can see? i asked my ISP about updating my firware..but thei said thei could not see any new drivers for my router..alteast not a swedish version lol..and thath the deafult version whas sufficient..but im at place now where i have nothing to loose, so sure i would still like to test install the UK version...if i just knowed how to do it??



It's just the router saying it can forward some packets to the next hop. You don't know
exactly why it can't send those packets out to the internet


Wrong, a network sniffer can show if the problem is with the LAN or with the internet connection.

this sniffer, can i apply your answer on it? what sniffer do you recommend? and you skilled in analyze sniffer logs?...i would need some help :)



A static internet ip address must be allowed by the ISP. A static LAN ip address behind a NAT connection sharing device is just a local setting. There is nothing wrong with giving a computer behind a NAT a static adress that is consistant with other LAN settings.

i think i should keep my static yes..however someone recomended me to manually set that IP on the WAN interface for your router instead of using DHCP

is thath a good idea? if so how do i do it?



The router log suggests that the router is failing to renew it's internet ip allocated by the router. We can't tell is this a symptom of another problem such as the DSL line being down or a cause (buggy router or ISP end not allocating an IP).



You are also jumping to conlusions. The sniffer log just shows reports of packets not
being delivered. It could be for other reasons such as the line dropping for other reasons such as an intermittent connection is a junction box somewhere or noise on the telephone line

My ISP says thei have tested and fixed stuff..and thei cant see any moore troubles on my line, and seens it's 2 different ISP now in serie thath i experience the same shit...it points away from a specific ISP problem, i have not expericen any troubles with my phones atleast :)